AM_Na(NaMg)Mg5Si8O22(OH)2_2
Formula: Na1.71 Mg6.13 Si8 O24 (H1.37 D.63)
Name: Na(NaMg)Mg5Si8O22(OH)2
Unit cell: 9.70169 17.89537 5.25744 90.0 102.597 90.0 , V=890.80
Space group: P121/M1 (11)

Iezzi G , Gatta G D , Kockelmann W , Della Ventura G , Rinaldi R , Schafer W , Piccinini M , Gaillard F , American Mineralogist , 90 (2004) p.695-700, Low-T neutron powder-diffraction and synchrotron-radiation IR study of synthetic, amphibole Na(NaMg)Mg5Si8O22(OH)2, Sample: T = 8 K